1. Department of Oral and Maxillofacial Surgery The Affiliated Zhongshan Hospital, Sun Yat‐sen University Zhongshan China
2. Department of Oral and Maxillofacial Surgery The Fifth Affiliated Hospital, Sun Yat‐sen University Zhuhai China
3. Department of Medical Intensive Care Unit The Affiliated Zhongshan Hospital, Sun Yat‐sen University Zhongshan China